JSON.stringify
console.log(JSON.stringify({})); // '{}'
console.log(JSON.stringify(true)); // 'true'
console.log(JSON.stringify("foo")); // '"foo"'
console.log(JSON.stringify([1, "false", false])); // '[1,"false",false]'
console.log(JSON.stringify({x: 5})); // '{"x":5}'
var family = {firstName: "John", lastName: "Miller", state: "BC"};
var object = JSON.stringify(family);
console.log(object); // {"firstName":"John","lastName":"Miller","state":"BC"}